-LRB- CNN -RRB- -- A jet lagged Serena Williams skipped any New Year celebrations for a good night 's sleep after starting her 2014 WTA campaign in Brisbane Tuesday with a win over Andrea Petkovic .

The top seed was extended by her German opponent before winning the second round match in straight sets , 6-4 6-4 and admitted she was heading to her hotel for an early night .

`` I do n't celebrate New Year 's Eve , so usually I 'm in bed at midnight , '' Williams told the WTA official website .

`` I always hear the fireworks though . They wake me up at midnight . Hopefully I can sleep through them tonight .

`` I 'm a very serious player . I never leave my room during a tournament , so I 'm not going out , '' she added .

Former top 10 player Petkovic proved a strong opponent for a season-opener and Williams dropped her service early in the match .

But she quickly recovered and also made inroads on the Petkovic service , as well as sending down 11 aces of her own .

`` It was an intense match , which was really good , '' Williams said . `` She 's a good player . She 's been in the top 10 before and she was on her way to being even better . So it was a really good match for me . ''

Williams will next play ninth seed Dominika Cibulkova , who had to battle for two hours 14 minutes to beat 43-year-old Japanese veteran Kimiko Date-Krumm , 6-3 1-6 6-3 .

Despite her desire for some shut eye , Williams will be hoping to have got back to more regular sleep patterns after only flying into Australia Saturday ahead of the tournament .

She tweeted : `` I keep going to sleep around 8:30 or 9pm ... Ughhh I 'm so tired trying to stay awake ... #jetlagisreal . ''

Third seed Maria Sharapova is on the comeback trail after an injury layoff so may have mixed feelings about the withdrawal of her schedule second round opponent , Australian teenager Ashleigh Barty , who has torn a left abductor muscle .

The Russian superstar will now advance to the quarterfinals , where she will play 2012 champion Kaia Kanepi of Estonia .

In other matches Tuesday , fourth seed Jelena Jankovic beat Elina Svitolina , 6-1 6-3 and Kanepi saw off eighth seed Carla Suarez Navarro 6-2 6-2 .

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Serena Williams wins opener at Brisbane International

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Beats Andrea Petkovic of Germany 6-4 6-4

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Admits to feeling jet lagged after flying into Australia Saturday

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Will be skipping any New Year celebrations